Tire-retaining demountable rim



J. WALKER. TIRE RETAINING DEMOUNTABLE RIM. APPLICATION FILED OCT. 13. I919.

Patented July 5, W210 ti I mt! hal TIM-RETAINING DEMOUNTABLE RIM.

application filed October 13, 1919.

To all whom it may concern:

Be it known that I, JOSEPH lYVALKER, a citizen of the United States, residing at Canonsburg, in. the county of Washington and State ot Pennsylvania, have invented certain new and usetul improvements in Tire-Retaining Demountable lttims, ot which the tollowin 1s a specification, reterence being had to t e accompanying drawings. k

This invention relates to an improved tire retaining demountable rim, it being the aim ot the present invention. to provide a very simple, etiicient and practical device of this kind, which is capable 0t being manutactured tor a relatively low cost and sold at a reasonable profit.

Another object of the invention is to ta cilitate the retaining ot the tire on the rim, and also to provide a rim, which is ve easily applied to and removed trom the telly ot the wheel. a

A further object ot. the invention is to pro vide means adjustably carried on the telly and designed to engage a part of the rim, to prevent movement ot the rim relat1vely to the telly.

A still turther object ot the invention is to provide a split rim to be threaded upon the telly, and means adjacent the split ends ot the rim to be engaged by the adjustable means carried by the telly tor preventing movement ot the rim relatively to the telly.

As anadditional object of the invention it is the aim to construct the threaded connections between the rim and the telly opposite to the torward rotation ot the wheel, in order to prevent the rim from unscrewing from the telly in case the means carried by the. telly tor preventing movement of the rim is not used, and also to provide means to limit the rim in its screwing action upon the telly.

.l Vhile the design and construction at pres ent illustrated and set torth is deemed preterablc, it is obvious that as a result ot a reduction v0t the invention to a more practical torm tor commercial purposes, the m-' vention may be susceptible to changes, and the right to these changesis claimed, provided they are comprehended within the sec e ot what is claimed.

.he invention comprises turther features and combination of parts, as will be hereinatter set torth, shown in the drawings and claimed.

" t Tn the drawings:

Specification of Letters Patent.

fl atented il'nly ti,

wheel, showing the improved tire retaining demountable rim as applied thereto. i 1g. 2 is a sectional view on line 2-2 of Fig. 1. lleterring more especially to the draw-- ings, l designates a conventional term of wheel including a hub 2, spolre 3, and a telly 4,-wh1ch provided with threads 5. i tire retaining and denmnntable rim 6 is mounted upon the telly, and has threads 7, whereby the rim may be screwed on the telly. At the terminals ot the threads 5 ot the telly a a shoulder 8 is termed, to limit the run in its movement on the telly. it is the aim of the invent-ion to construct the threaded connections 5 and 7 so that the rim may be screwed upon the telly in a direction opposite to the rotation ot the wheel, so

as to prevent the rim trom unscrewing durmg the forward rolling or turning action of the Wheel. In other words, by means ot the forward rolling or turning action ot the wheel, the rim is kept screwed tightly upon the telly, the Shoulder 8 acting to limit the rim in its movement upon the telly.

The rim, in order to facilitate its screwing action on the telly ot the wheel indicated at 9. When first applying the rim, it is necessary to spring or expand the rim slightly, so as to cause the threads to engage and take hold. in this way, the threads will remain tightly in engagement with the threads of the telly, but not too much, as to prevent a turning action of the rim, when screwing the rim on the telly.

is split, 5,

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The rim atintervals on its outer side tace is provided with a plurality of depressions 10, which may receive a suitable tool (3r instrument, so as to turn the rim, and facilitate the screwing ot the rim on the telly. For instance, a spanner member may engage the depressions 10 to turn the rim home. Adjacent the ends ot the rim where it is split, lL-shaped recesses 11 are formed, and threaded through the telly, as shown clearly in Fig. 1 is a pair of bolts 12. These bolts are spaced, and their outer' ends are designed to engage the end shoulders 13 ot the recesses 11, to prevent movement ot the rim, after it is applied upon the telly. Eluitable lock 111112814 are threaded upon the bolts, and in engagement with the inner tace ot the telly to prevent movement of the bolts, atter they are screwed home. The rim .is suitably channeled out as shown at 15, and en gaging said channel is the usual tire in as ittltl shown in full lines in Fig. l and in dotted lines in Fig. This tire ll; is of the usual construction and is designe lto engage the uspal inner tube (not shown). By means of the channel 15 of theirim, the tire is retained in position on the rim and the rim is held on the felly by virtue of the screw threads, the shoulder 8 and the refiaining holis The invention having been sei; forth what is claimed as new and useful is:

in a tire retaining demonntable rim, the combination with a fell having its outer cylindrical surface threaded concentric with the center of ilie Wheel from one side face of the fellyto the other, of a split rim, the inner cyindrical surface of which. being-threaoed concentric Wish the wheel "from one split end to she other and adapted to engage the threads of the felly, said split ends of the rim acting to permit the rim to expand When fitting the rim to the felly whereby the spring action of the rim will cause a relative pressure of the rim on the felly, to insure partial contact between the connecting threads of the rim and the felly, the adjacent split ends of the rim havln of right angle or rectangular s ape, the longer faces of the recesses being concentric with the rim, the shorter faces of the recesses constituting radial shoulders, said rim having channels for the reception of the tire, and radial bolts threaded through the felly and engaging the radial shoulders of said recesses to prevent excessive binding between the threaded connections to retain the rim in position on the felly against relative movement, the ends of the bolts on aging the longer faces of. the recesses to a ditionally prevent binding between the threaded surfaces.

In testimony whereof I allix m si nature.

JOSEPH WXKL ER.

recesses 

